Donna Meehan

[Math Lady Hazel 🇦🇷 @mathladyhazel]

This math joke.

[Math Files @Math_files]

People often say mathematicians are not afraid of anything—except one thing: the Collatz Conjecture.

It is one of the most famous unsolved mysteries in mathematics.

Here’s how it works:
Pick any positive number.
If the number is odd, multiply it by 3 and add 1.
If the number is even, divide it by 2.

Now repeat this process again and again.

For example, start with 7:
7 is odd → 3×7 + 1 = 22
22 is even → 22 ÷ 2 = 11
11 is odd → 3×11 + 1 = 34
…and so on we get:

7 → 22 → 11 → 34 → 17 → 52 → 26 → 13 → 40 → 20 → 10 → 5 → 16 → 8 → 4 → 2 → 1

The surprising claim is this: no matter which number you start with, you will always eventually reach 1.

It sounds simple, but no one has been able to prove that it is true for all numbers. That’s why it remains a mystery.

[Math Lady Hazel 🇦🇷 @mathladyhazel]

Escher's Rubik's Cube. https://t.co/C4NqYVWZT6.

[Howie Hua @howie_hua]

A really fun fact about pi day!

[Donna Meehan @MPHmathdept]

https://t.co/9hAYviM9Dn

[TeacherGoals @teachergoals]

Growth mindset. 🌱

[Donna Meehan @MPHmathdept]

@NaomiTrivison It sure made teaching more fun! I loved seeing what students would create.

[Daniel Mentrard @dment37]

In Pascal's triangle, the sum of the “diagonals” forms the Fibonacci sequence
Visualization |Animation | Interactive applet
@geogebra
https://t.co/s8R8SUoBzg
#geogebra #math #science #iteachmath #mtbos #visualization #elearning @bancoche #physics

[Howie Hua @howie_hua]

Here's a cool math fact: If we can go up a set of stairs at one or two steps at a time, the number of different ways we can go up those stairs will always be a Fibonacci number! Here's why:

[TeacherGoals @teachergoals]

This is powerful! 🙌
🌐 https://t.co/3qw2SY2yXy

[Donna Meehan @MPHmathdept]

https://t.co/bzTwVCqab2

[Howie Hua @howie_hua]

It's Mental Math Monday! How would you mentally calculate 15×24?

[Donna Meehan @MPHmathdept]

https://t.co/RI02X0LTzM

[Saint Joseph's Men's Lacrosse @SJUHawks_MLax]

Wray steps down as men’s lacrosse head coach; Meehan promoted to head coach.

#THWND | https://t.co/fhyf9c1tPi

[Steven Strogatz @stevenstrogatz]

This week's installment of Math, Revealed -- Let's Get Packing! Please retweet this gift link, which lets people see the article for free.
https://t.co/NULrXzxJi3

[Donna Meehan @MPHmathdept]

https://t.co/Bv1irit40u

[Howie Hua @howie_hua]

Happy Star Wars Day!

May the fourths be "with you."

[Howie Hua @howie_hua]

Happy pi day! This one blew my mind when @aap03102 shared this.

[Howie Hua @howie_hua]

Watch this video if you don't like math

[CNY Central @CNYCentral]

It's called "brushing," and it's the latest scam targeting holiday shoppers this year.
https://t.co/wFpuX07fVy